An ontology based heterogeneous data query mechanism for power system
In electricity enterprises,there are many heterogeneous databases developed in different times or by different sectors,and the data sources of these systems are independent of each other and difficult to be exchanged,shared or integratedbetween systems because of semantic conflicts.This paper presents a query mechanism for integrating heterogeneous data sources based on the ontological theory within the power enterprises.It provides a unified data query interlace for decision-making.Experiments show that this mechanisms can effectively solve semantic conflicts between heterogeneous data sources,and improve the accuracy of the data analysis.